/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

#ifndef _THRIFT_TRANSPORT_TSHORTREADTRANSPORT_H_
#define _THRIFT_TRANSPORT_TSHORTREADTRANSPORT_H_ 1

#include <cstdlib>

#include <thrift/transport/TTransport.h>
#include <thrift/transport/TVirtualTransport.h>

namespace apache
{
namespace thrift
{
namespace transport
{
namespace test
{

/**
 * This class is only meant for testing.  It wraps another transport.
 * Calls to read are passed through with some probability.  Otherwise,
 * the read amount is randomly reduced before being passed through.
 *
 */
class TShortReadTransport : public TVirtualTransport<TShortReadTransport>
{
public:
    TShortReadTransport(boost::shared_ptr<TTransport> transport, double full_prob)
        : transport_(transport)
        , fullProb_(full_prob)
    {}

    bool isOpen()
    {
        return transport_->isOpen();
    }

    bool peek()
    {
        return transport_->peek();
    }

    void open()
    {
        transport_->open();
    }

    void close()
    {
        transport_->close();
    }

    uint32_t read(uint8_t* buf, uint32_t len)
    {
        if (len == 0)
        {
            return 0;
        }

        if (rand() / (double)RAND_MAX >= fullProb_)
        {
            len = 1 + rand() % len;
        }

        return transport_->read(buf, len);
    }

    void write(const uint8_t* buf, uint32_t len)
    {
        transport_->write(buf, len);
    }

    void flush()
    {
        transport_->flush();
    }

    const uint8_t* borrow(uint8_t* buf, uint32_t* len)
    {
        return transport_->borrow(buf, len);
    }

    void consume(uint32_t len)
    {
        return transport_->consume(len);
    }

    boost::shared_ptr<TTransport> getUnderlyingTransport()
    {
        return transport_;
    }

protected:
    boost::shared_ptr<TTransport> transport_;
    double fullProb_;
};

}
}
}
} // apache::thrift::transport::test

#endif // #ifndef _THRIFT_TRANSPORT_TSHORTREADTRANSPORT_H_
